Pro Nets Technology WU61RL USB WIRELESS LAN CARD User Manual

Pro-Nets Technology Corporation USB WIRELESS LAN CARD

UserManual.wiki >

Pro Nets Technology >

WU61RL User Manual

Users Manual

Wireless 54Mbps USB 2.0 Adapter User’s Manual (For SOHO Users) August, 2006

1FCC Warning This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communication. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which - Consult the dealer or an experienced radio/TV technician for help. the receiver is connected. FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IMPORTANT NOTE: FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of about eight inches (20cm) between the radiator and your body. This transmitter must not be co-located or operated in conjunction with any other antenna or transmitter. CE Mark Warning This is a Class B product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate measures. Copyright 2006 All Rights Reserved. No part of this document can be copied or reproduced in any form without written consent from the company.

41. Introduction Congratulations on purchasing this Wireless 54Mbps USB 2.0 Adapter. Wireless 54Mbps USB 2.0 Adapter is a convenient Plug & Play USB 2.0 solution that brings wireless networking to your laptop or desktop PC. It provides up to a 128-bit level of WEP security to your wireless data transfers. The wireless USB 2.0 adapter comes with software drivers for the most popular Microsoft Windows operating systems and can be integrated into a larger network, running Windows XP/2000/Me/98SE in either Ad-Hoc mode (without an access point or router) or Infrastructure mode (with an access point or router). The IEEE 802.11g Ethernet standard allows you to connect computers and 802.11g compatible devices at speeds up to 54Mbps*, dependent upon the distance between wireless adapters, the configuration of your working environment, or the capabilities or limitations of your computer systems. 1.1 Features z Up to 54Mbps data transfer rates z Supports 64/128-bit WEP data encryption function for high level of security z Supports WPA-PSK advanced WLAN security z Supports Infrastructure mode z Supports Ad-Hoc mode (peer-to-peer communication among any wireless users, no Access Point required) z Supports automatic fallback increase data security and reliability z Supports Power Save mode z USB 2.0 interface 1.2 LED Indicator LED Light Status Description Flashing Wireless LAN has Activity (ACT) data being sent. ACT / LINK On Wireless LAN has been activated. 1.3 Package Contents ‧ One Wireless USB 2.0 Adapter ‧ One USB A-type male to female extension cable ‧ One CD includes driver and user’s manual

52. Installation Procedure Note: If you have installed the Wireless USB 2.0 Adapter driver & utility before, please uninstall the old version first. Note: The following installation was operated under Windows XP. (Procedures will be same for Windows 2000 / Windows ME / Windows 98SE) 2.1 Install Driver & Utility STEP1: Found New Hardware Wizard is displayed after the adapter is installed and the computer is restarted. Please click Cancel to continue.

6STEP2: Insert Installation CD into CD-ROM drive then windows below will appear. Click Install Driver Utility to begin device driver installation. STEP3: Please wait for a while during the Setup Wizard is preparing the setup.

7STEP4: Please read the following license agreement. Use the scroll bar to view the rest of this agreement. Click Yes to accept the agreement. STEP5: In Windows XP, there is a Windows Zero Configuration Tool for you to setup wireless adapter. You can choose to configure the adapter through the Microsoft Zero Configuration Tool or the Ralink Configuration Tool. It is recommended to choose the Ralink Configuration Tool for the adapter. Click Next to continue.

8STEP6: If you need the adapter to operate with better performance, place choose Optimize for performance mode to enable the Tx Burst mode. Or you can choose Optimize for WiFi mode to run in standard wireless network. STEP7: Please wait for a while during the adapter is configuring your new software installation.

9STEP8: When the adapter is installed properly, the configuration utility will be displayed automatically. STEP9: Please restart your computer after the installation has finished. Choose Yes, I want to restart my computer now and click Finish button.

10 To check if the adapter is properly installed, you can right-click My Computer Æ choose Properties Æ click Device Manager. The Configuration Utility appears as an icon on the system tray of Windows while the adapter is running. You can open the utility by double-click on the icon. Right-click the icon, there are some items for you to operate the configuration utility, z Launch Config Utilities Æ Select this option to open the Configuration Utility tool. z Use Zero Configuration as Configuration utilityÆ Select this option to use Windows XP built-in wireless configuration utility (Windows Zero Configuration) to configure to card. z Switch to AP Mode z Exit Æ Select Exit to close the Configuration Utility tool.

113. Wireless Network Configuration Utility The Configuration Utility is a powerful application that helps you to configure the Wireless USB 2.0 adapter and monitor the link status and statistics during the communication process. When the USB adapter is installed, the configuration utility will be displayed automatically. This adapter will auto connect to wireless device which has better signal strength and no wireless security setting. Note: In Windows XP, there is a “Windows Zero Configuration Tool” for you to setup wireless clients. If you want to switch the configuration utilities, please follow one of the ways as below: [First Way] Right-click the icon in the system tray and select Use Zero Configuration as Configuration utility [Second Way] STEP1: Right-click the icon and select “View Available Wireless Networks” STEP2: Click “Advanced” as below,

13 3.2 Link Status In this section, you can immediately monitor the current connected link status, such as Link Speed, Throughput, Link Quality, Signal Strength, Noise Level …etc.

17designate the wireless connection mode for the Ad-Hoc network. 802.11 B only – This adapter can be compatible with both 802.11g and 802.11b wireless stations. If there are only 802.11b wireless stations in the network, you can set the card to this mode. 802.11 B/G mix – If you have a mix of 802.11b and 802.11g wireless stations in your network, it is recommended to setting the card to this mode. This mode is also the default setting. 802.11 G only –This card can be compatible with both 802.11g and 802.11b wireless stations. If there are only 802.11g wireless stations in the network, you can set the card to this mode. Preamble: The preamble defines the length of the CRC block for communication among wireless devices. This option is only active in the Ad Hoc network. There are two modes including Auto, Long and Short Preamble. If “Auto” mode is selected, the adapter will auto switch the preamble mode depending on the wireless devices is connecting to. RTS Threshold: Minimum packet size required for an RTS (Request To Send). For packets smaller than this threshold, an RTS is not sent and the packet is transmitted directly to the wireless network. Select a setting within a range of 0 to 2347 bytes. Minor change is recommended. Fragment Threshold: The value defines the maximum size of packets; any packet size larger than value will be fragmented. If you have decreased this value and experience high packet error rates, you can increase it again, but it will likely decrease overall network performance. Select a setting within a range of 256 to 2346 bytes. Minor change is recommended. Channel: This setting is only available for Ad Hoc mode. Select the number of the radio channel used for the networking. The channel setting should be the same with the network you are connecting to.

183.3.2 Authentication and Security Authentication Type: This setting has to be consistent with the wireless networks that the adapter intends to connect. Open: No authentication is needed among the wireless devices. Shared: Only Wireless device using a shared key (WEP Key identified) is allowed to connecting each other. Setup the same key as the wireless device that the adapter intends to connect. LEAP: LEAP is a pre-EAP, Cisco-proprietary protocol, with many of the features of EAP protocols. Cisco controls the ability of other vendors to implement this protocol, so it should be selected for server products are not a concern. When you have set up LEAP authentication, you have to enter the use name and password of your computer. WPA: WPA provides a scheme of mutual authentication using either IEEE 802.1x/Extensible Authentication Protocol (EAP) authentication or pre-shared key (PSK) technology. It provides a high level of assurance to enterprise, small business and home users that data will remain protected and that only authorized users may access their networks. For enterprises that have already deployed IEEE 802.1x authentication, WPA offers the advantage of leveraging existing authentication databases and infrastructure. WPA-PSK – It is a special mode designed for home and small business users who do not have access to network authentication servers. In this mode, known as Pre-Shared Key, the user manually enters the starting password in their access point or gateway, as well as in each wireless station in the network. WPA-PSK takes over automatically from

19that point, keeping unauthorized users that don’t have the matching password from joining the network, while encrypting the data traveling between authorized devices. WPA2 – Like WPA, WPA2 supports IEEE 802.1x/EAP authentication or PSK technology. It also includes a new advanced encryption mechanism using the Advanced Encryption Standard (AES). AES is required to the corporate user or government users. The different between WPA and WPA2 is that WPA2 provides data encryption via the AES. In contrast, WPA uses Temporal Key Integrity Protocol (TKIP). WPA2-PSK – WPA2-PSK is also for home and small business. The difference between WPA-PSK and WPA2-PSK is that WPA2-PSK provides data encryption via the AES. In contrast, WPA-PSK uses Temporal Key Integrity Protocol (TKIP). WPA 802.1X – 802.1x authentication is required in WPA. In the 802.11 standard, 802.1x authentication was optional. WPA2 802.1X – WPA2 is the next-generation Wi-Fi security standard, combining the most powerful authentication and encryption techniques to protect wireless networks from unauthorized use. Based upon the recently ratified IEEE 802.11i standard, WPA2 adds the Advanced Encryption Standard (AES) to the original WPA specification to provide the greatest levels of network security available. The National Institute of Standards and Technology (NIST) advocate the use of AES security to protect sensitive digital information on government networks. 802.1x Setting: When you have set the Authentication Type to Open, Shared, WPA or WPA2, you can also enable IEEE 802.1x setting to use the authentication server or certification server to authenticate client users. Encryption Mode: None – Disable the Encryption mode. WEP – Enabled the WEP Data Encryption. When the item is selected, you have to continue setting the WEP Key Length & the key Index. TKIP – TKIP (Temporal Key Integrity Protocol) changes the temporal key every 10000 packets (a packet is a kind of message transmitted over a network). This insures much greater security than the standard WEP security. AES – AES has been developed to ensure the highest degree of security and authenticity for digital information and it is the most advanced solution defined by IEEE 802.11i for the security in the wireless network. Note: All devices in the network should use the same encryption method to ensure the communication. WPA Pre-Shared Key: The WPA-PSK key can be from 8 to 64 characters and can be letters or numbers. This same key must be used on all of the wireless stations in the network. WEP Key (Key1~Key4): Only valid when using WEP encryption algorithm. The WEP keys are used to encrypt data transmitted in the wireless network. There are two types of key length:

2064-bit & 128-bit. Select the default encryption key form key1 to key4 by selected the radio button. Fill the text box by following the rule below: 64-bit – Input 10-digit Hex values (in the “A-F”, “a-f, and “0-9” range) or 5-digit ASCII characters (including “a-z” and “0-9”) as the encryption keys. For example: “0123456aef” or “test1” 128-bit – Input 26-digit Hex values (in the “A-F”, “a-f, and “0-9” range) or 13-digit ASCII characters (including “a-z” and “0-9”) as the encryption keys. For example: “01234567890123456789abcdef” or “administrator” 3.3.3 802.1x Setting-Certification The IEEE 802.1X specification describes a protocol that can be used for authenticating both clients and servers on a network. The authentication algorithms and methods are those provided by the Extensible Authentication Protocol (EAP), a method of authentication that has been in use for a number of years on networks that provide Point-to-Point Protocol (PPP) support as many Internet service providers and enterprises do. When an AP acting as an authenticator detects a wireless station on the LAN, it sends an EAP-Request for the user’s identity to the device. (EAP, or the Extensible Authentication Protocol, is an authentication protocol that runs before network layer protocols transmit data over the link) In turn, the device responds with its identity, and the AP relays this identity to an authentication server, which is typically an external RADIUS server. [An example for MD5 Authentication]

21 Authentication Type: The EAP authentication protocols this adapter has supported are included as follows. This setting has to be consistent with the wireless APs or Routers that the adapter intends to connect. PEAP: Protect Extensible Authentication Protocol. PEAP transport securely authentication data by using tunneling between PEAP clients and an authentication server. PEAP can authenticate wireless LAN clients using only server-side certificates, thus simplifying the implementation and administration of a secure wireless LAN. LS/Smart Card: Transport Layer Security. Provides for certificate-based and mutual authentication of the client and the network. It relies on client-side and server-side certificates to perform authentication and can be used to dynamically generate user-based and session-based WEP keys to secure subsequent communications between the WLAN client and the access point. TTLS: Tunneled Transport Layer Security. This security method provides for certificate-based, mutual authentication of the client and network through an encrypted channel. Unlike EAP-TLS, EAP-TTLS requires only server-side certificates MD5-Challenge: MD5-Challenge is the easiest EAP type. It requires the wireless station to enter a set of user name and password as the identity to RADIUS Server.

22Session Resumption: There are “Disabled”, “Reauthentication”, “Roaming”, “SameSsid”, and “Always” selections for you to choose whether to recovery the session in different status. Identity: Enter the name as the identity for the server. Password: Enter the password as the identity for the server. Use Client Certificate: A client certificate is required for TLS, and is optional for TTLS and PEAP. This forces a client certificate to be selected from the appropriate Windows Certificate Store and made available to the RADIUS server for certification. Tunneled Authentication: -- Protocol: When the authentication type is PEAP or TTLS, select a protocol to be used to build the encrypted tunnel. -- Identity: This is the protected user EAP Identity used for authentication. The identity specified may contain up to 63 ASCII characters, is case sensitive and takes the form of a Network Access Identifier, consisting of <name of the user>@<user’s home realm>. The user’s home realm is optional and indicates the routing domain. -- Password: The password used for authentication. It may contain up to 63 ASCII characters and is case sensitive. 3.3.4 802.1x Setting-CA Server Use Certificate Chain: When the EAP authentication types such as TLS, TTLS or PEAP is

23selected and required a certification to tell the client what server credentials to accept from the authentication server in order to verify the server, you have to enable this function. Certificate Issuer: Choose the server from the list to issue the certificate. If “Any Trusted CA” is selected, any CA included in the list (provided by the Microsoft Certificate Store) is permitted. Allow Intermediate Certificates: A server designates an issuer as a trusted root authority by placing the issuer’s self-signed certificate, which contains the issuer’s public key, into the trusted root certification authority certificate store of the host computer. Intermediate or subordinate certification authorities are trusted only if they have a valid certification path from a trusted root certification authority. Server Name: Enter the authentication server name. Server name must match exactly: When selected, the server name must match exactly the server name found on the certificate. Domain name must end in specified name: When selected, the server name field identifies a domain. The certificate must use a server name belonging to this domain or to one of its sub-domains (e.g. zeelans.com, where the server is blueberry.zeelans.com) but it may be any name used in the certificate name field. 3.4 Statistics Statistics page displays the detail counter information based on 802.11 MIB counters. This page translates that MIB counters into a format easier for user to understand.

24 Transmit Statistics: 1. Frames Transmitted Successfully: Frames successfully sent. 2. Frames Transmitted Successfully Without Retry: Frames successfully sent without any retry. 3. Frames Transmitted Successfully After Retry: Frames successfully sent with one or more reties. 4. Frames Fail To Receive ACK After All Retries: Frames failed transmit after hitting retry limit. 5. RTS Frames Successfully Receive CTS: Successfully receive CTS after sending RTS frame. 6. RTS Frames Fail To Receive CTS: Failed to receive CTS after sending RTS. Receive Statistics: 1. Frames Received Successfully: Frames received successfully. 2. Frames Received With CRC Error: Frames received with CRC error. 3. Frames Dropped Due To Out-of-Resource: Frames dropped due to resource issue. 4. Duplicate Frames Received: Duplicate received frames. Reset counters to zero. 3.5 Advanced In the “Advanced”, you can configure more advanced settings, for example: wireless Mode, B/G Protection, Tx Rate, Country Region Code…etc.

25Wireless Mode: 802.11 B/G mix – If you have a mix of 802.11b & 802.11g wireless stations in your network, it is recommended to setting the card to this mode. This mode is also the default setting. 802.11 B only – This adapter can be compatible with both 802.11g and 802.11b wireless stations. If there are only 802.11b wireless stations in the network, you can set the adapter to this mode. 802.11 G only –This adapter can be compatible with both 802.11g and 802.11b wireless stations. If there are only 802.11g wireless stations in the network, you can set the adapter to this mode. Ad Hoc Wireless mode: There are four types. 802.11B only, 802.11 B/G mixed 802.11A only, and 802.11G only modes are supported. Select Your Country Region Code: The available channel differs from different countries. For example: USA (FCC) is channel 1-11, Europe (ETSI) is channel 1-13. The operating frequency channel will be restricted to the country user located before importing. If you are in different country, you have to adjust the channel setting to comply the regulation of the country. 11B/G Protection: If you have a mix of 802.11b & 802.11g wireless stations in the network, it is recommended to enable the protection mechanism. This mechanism can decrease the rate of data collision between 802.11b and 802.11g wireless stations. When the protection mode is enabled, the throughput of the adapter will be a little lower due to many of frame traffic should be transmitted. Auto – Based on the status of network and automatically disable/enable protection mode. On – Always enable the protection mode. Off – Always disable the protection mode. Tx Rate: Manually force the Transmit using selected rate. Default is auto.There are several options including Auto/1/2/5.5/6/9/12/18/24/36/48/54Mbps for you to select. When the “Auto” is selected, the device will choose the most suitable transmission rate automatically. The higher data rate you designated in the network, the shorter distance is allowed between the card and the wireless stations. When the wireless mode is “802.11 B only”, the maximum data rate is 11 Mbps (11b) so that there are only “Auto/1/2/5.5/11Mbps” options you can select. Tx BURST: The Burst enables the adapter to deliver the better throughput in the same period and environment. Enable TCP Window Size: The TCP Window is the amount of data a sender can send on a particular connection before it gets an acknowledgment back from the receiver that it has gotten some of it. When the Router or AP card is connecting to have set up the TCP Window,

26you can enable the parameter to meet the data size for the Router or AP connection. The larger TCP Window the better performance. Fast Roaming at -70dBm: You can enable the parameter when you want to fast roaming to the network nearby without intercepting the wireless connection, especially the adapter is applied to the multimedia application or a voice call. The adapter will fast roaming to the near network when the receive sensitivity (signal strength) is lower to the value you have set up. Turn Off RF Button: If you want to turn off the radio of the adapter temporarily, click this button. To turn on the radio, click this button again. Radio On: Indicate to turn on radio. Radio Off: Indicate to turn off radio. CCX 2.0: CCX 2.0 (Cisco Compatible Extensions) is developed by Cisco for the radio monitoring and fast roaming. LEAP Turn on CCKM: During normal operation, LEAP-enabled client devices mutually authenticate with a new access point by performing a complete LEAP authentication, including communication with the main RADIUS server. When you configure your wireless LAN for fast re-association, however, LEAP-enabled client devices roam from one access point to another without involving the main server. Using Cisco Centralized Key Management (CCKM), and access point configured to provide Wireless Domain Services (WDS) takes the place of the RADIUS server and authenticates the client so quickly that there is no perceptible delay in voice or other time-sensitive applications. Enable Radio Measurement: When this parameter is enabled, the Cisco AP can run the radio monitoring through the associated CCX-compliant clients to continuously monitor the WLAN radio environment and discover and new APs that are transmitting beacons. Non-Serving Channel Measurements: The Cisco AP can perform monitoring measurements through the CCX-compliant clients on the non-serving channels when this parameter is enabled. Limit xxx milliseconds (0-2000): It limits the channel measurement time. The default value is 250 milliseconds.

273.6 QoS The QoS Page of RaConfig. It involves “WMM Enable”, “WMM – Power Save Enable” and DLS setup. WMM Enable: Enable Wi-Fi Multi-Media. WMM – Power Save Enable: Enable WMM Power Save. Direct Link Setup Enable: Enable DLS (Direct Link Setup). 3.6.1 Configure to enable Wi-Fi Multi-Media If you want to use “WMM – Power Save” or “Direct Link”, you must enable WMM. The setting method of enabling WMM indicates as follows: Step1: Click “WMM Enable” Step2: Click “Apply”.

293.6.2 Enable WMM – Power Save Step1: Click “WMM – Power Save Enable”. And Click “Setting…” button. Step2: After clicking “Setting…” button, show “Power Save Setting” dialog. Please select which ACs you want to enable. Then click “Apply” button. The setting of enabling WMM – Power Save is successfully.

31The Setting of DLS indicates as follow: 1. Fill in the blanks of Direct Link with MAC Address of STA. The STA must conform to two conditions as follow: Step1: Connect with the same AP that support DLS features. Step2: Have to enable DLS. 2. Timeout Value represents that it disconnect automatically after some seconds. The value is integer. The integer must be between 0~65535. It represents that it always connects if the value is zero. Default value of Timeout Value is 60 seconds

323. Click “Apply” button. The result will look like the below figure. Describe “DLS Status” as follow: 1. As the up figure, after configuring DLS successfully, show MAC address of the opposite side and Timeout Value of setting in “DLS Status”. In “DLS Status” of the opposite side, it shows MAC address of myself and Timeout Value of setting. 2. Display the values of “DLS Status” to “Direct Link Setup” as follow: Step1: In “DLS Status”, select a direct link STA what you want to show it’s values in “Direct Link Setup.

33Step2: Double click. And the result will look like the below figure. 3. Disconnect Direct Link Setup as follow: Step1: Select a direct link STA.

34Step2: Click “Tear Down” button. The result will look like the below figure. 3.7 About About page display the wireless card and driver version information.

35 In the “About”, you can click the hyperlink to connect the website for the information of the wireless chipset vendor and review basic information about the Utility such as the RaConfig Version, Driver Version, EEPROM Version, IP Address, Sub Mask, and Default Gateway.

364. Troubleshooting This chapter provides solutions to problems usually encountered during the installation and operation of the adapter. 1. Symptom: The LED is Off. Possible Remedy: Make sure the Wireless adapter is inserted properly. Otherwise, please contact your vendor. 2. Symptom: The LED is always on not blinking. Possible Remedy: Make sure that you have installed the driver from the attached CD. 3. Symptom: The LED is blinking but the Wireless adapter icon does not appear in your icon tray. Possible Remedy: Make sure that you have installed the Utility from the attached CD. 4. Symptom: The Wireless adapter is linking, but can’t share files with others. Possible Remedy: Make sure the File and printer-sharing function is enabled. 5. Symptom: Slow or unstable performance. Possible Remedy: Try to change the channel of the communicating group or move your device closer to the communicating device. 6. Symptom: Can’t find the utility icon in the taskbar when plug in the Wireless adapter. Possible Remedy: You could enable the function by click the icon of Start Æ All Programs Æ Ralink Utility. 7. Symptom: No wireless signal.

37Possible Remedy: Move the antennas of the access point or wireless router into an L shape (one vertically, and one horizontally). Click on the Refresh button on the Site Survey screen. If the computer still does not see the Access Point, and then try to move your Access Point closer to the computer. Then click on the Refresh button again. If the computer still does not see the Access Point, move all things that may cause interference with the wireless signal. 8. Symptom: If you still cannot get a wireless connection of the network. Possible Remedy: Step 1- Turn the computer off Step 2- Turn the Access Point off Step 3- Turn the Access Point on Step 4- Wait 30 seconds Step 5- Turn the computer back on Step 6- Using the Utility reconnect to the Access Point: Step 7- Double click on the bar graph icon in the system tray Step 8- Select the Site Survey Link Step 9- Highlight the SSID of your wireless network and click connect Step 10- Click OK if all the settings are correct 9. What is the IEEE 802.11g standard? 802.11g is the new IEEE standard for high-speed wireless LAN communications that provides for up to 54 Mbps data rate in the 2.4 GHz band. 802.11g is quickly becoming the next mainstream wireless LAN technology for the home, office and public networks. 802.11g defines the use of the same OFDM modulation technique specified in IEEE 802.11a for the 5 GHz frequency band and applies it in the same 2.4 GHz frequency band as IEEE 802.11b. The 802.11g standard requires backward compatibility with 802.11b. The standard specifically calls for: A. A new physically layer for the 802.11 Medium Access Control (MAC) in the 2.4 GHz frequency band, know as the extended rate PHY(ERP(. The ERP adds OFDM as a mandatory new coding scheme for 6, 12, and 24 Mbps (mandatory speeds), and 18, 36, 48, 54 Mbps (optional speeds). The ERP includes the modulation schemes found in 802.11b including CCK for 11 and 5.5 Mbps and Barker code modulation for 2 and 1 Mbps. B. A protection mechanism called RTS.CTS that governs how 802.11g devices and 802.11b devices interoperate.

38 10. What does IEEE 802.11 feature support? The product supports the following IEEE 802.11 functions: -- CSMA/CA Plus Acknowledge Protocol -- Multi-Channel Roaming -- Automatic Rate Selection -- RTS/CTS Feature -- Fragmentation -- Power Management 11. What is Ad-Hoc? An Ad-Hoc integrated wireless LAN is a group of computers, each has a Wireless LAN adapter, Connected as an independent wireless LAN. Ad-Hoc wireless LAN is applicable at a departmental scale for a branch or SOHO ope ration. 12. What is Infrastructure? An integrated wireless and wireless and wired LAN is called an Infrastructure configuration. Infrastructure is applicable to enterprise scale for wireless access to central database, or wireless application for mobile workers. 13. What is BSS ID? A specific Ad hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must be configured with the same BSS ID. 14. What is WEP? WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 40 bit shared key algorithm, as described in the IEEE 802.11 standard. 15. What is TKIP? TKIP is a quick-fix method to quickly overcome the inherent weaknesses in WEP security, especially the reuse of encryption keys. TKIP is involved in the IEEE 802.11i WLAN security standard, and the specification might be officially released by early 2003. 16. What is AES? AES (Advanced Encryption Standard), a chip-based security, has been developed to ensure the highest degree of security and authenticity for digital information, wherever and however communicated or stored, while making more efficient use if hardware and/or

39software than previous encryption standards. It is also included in IEEE 802.11i standard. Compare with AES, TKIP is a temporary protocol for replacing WEP security until manufacturers implement AES at the hardware level. 17. Would the information be intercepted while transmitting on air? WLAN features two-fold protection in security. On the hardware side, as with Direct Sequence Spread Spectrum technology, it has the inherent security feature of scrambling. On the software side, WLAN series offer the encryption function (WEP) to enhance security and Access Control. Users can set it up depending upon their needs. If you have any troubles to configure or setup this WLAN adapter, please feel free to contact us. Before contacting us, make sure collect following information. Submit complete detailed information of your problem will help us to provide you accurate answers. Model Name: Serial Number: PC Settings: Other:

Navigation menu

Upload a User Manual

Namespaces

Wiki Guide
HTML
PDF
Info

Views

User Manual
Discussion / Help

Navigation

© 2024 UserManual.wiki | Privacy Policy

Contact Us
DMCA